/* FARADAY tokens (spec §9.2). Dark is the source palette; light is a full scheme, not an inversion. */
:root {
  --bg: #0A0D11;
  --surface-1: #12161B;
  --surface-2: #181D23;
  --well: #0E1115;
  --border: #1F262E;
  --text: #EEF2F5;
  --text-2: #9AA6B2;
  --text-3: #7A8794;
  --accent: #F0B35B;
  --accent-fill: #F0B35B;
  --sealed: #3ECF8E;
  --danger: #F25555;
  --cta-fill: #E6EAEE;
  --cta-text: #0A0D11;
  --mark-bg: rgba(240, 179, 91, 0.16);
  /* The Faraday screen: the site's one piece of ornament, drawn in CSS so the page still fetches nothing. */
  --mesh: rgba(154, 166, 178, 0.16);
  --rule: #1F262E;
  color-scheme: dark light;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #F3F5F7;
    --surface-1: #FFFFFF;
    --surface-2: #FFFFFF;
    --well: #E9EDF1;
    --border: #DDE3E9;
    --text: #12161B;
    --text-2: #4A5560;
    --text-3: #5E6975;
    --accent: #8F5309;
    --sealed: #0B7A4C;
    --danger: #BC2F2F;
    --cta-fill: #12161B;
    --cta-text: #F3F5F7;
    --mark-bg: rgba(240, 179, 91, 0.28);
    --mesh: rgba(18, 22, 27, 0.07);
    --rule: #DDE3E9;
  }
}

@font-face { font-family: "IBM Plex Sans"; font-weight: 400; font-style: normal; font-display: swap; src: url("/fonts/IBMPlexSans-Regular.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-weight: 500; font-style: normal; font-display: swap; src: url("/fonts/IBMPlexSans-Medium.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-weight: 600; font-style: normal; font-display: swap; src: url("/fonts/IBMPlexSans-SemiBold.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 400; font-style: normal; font-display: swap; src: url("/fonts/IBMPlexMono-Regular.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 500; font-style: normal; font-display: swap; src: url("/fonts/IBMPlexMono-Medium.woff2") format("woff2"); }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/25px "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  /* Wide content scrolls inside its own container; the page itself never does. */
  overflow-x: hidden;
}
a { color: inherit; text-decoration: underline; text-decoration-color: var(--text-3); text-underline-offset: 3px; }
a:hover { text-decoration-color: currentColor; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
code, .mono { font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace; }
code { font-size: 14px; background: var(--well); border: 1px solid var(--border); border-radius: 4px; padding: 1px 5px; }
pre { margin: 12px 0 0; background: var(--well); border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; overflow-x: auto; font-size: 13px; line-height: 20px; }
pre code { background: none; border: 0; padding: 0; font-size: inherit; }
.small { font-size: 14px; line-height: 20px; color: var(--text-2); }
.label {
  display: inline-block; margin-right: 10px;
  font: 500 11px/14px "IBM Plex Mono", ui-monospace, monospace; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3);
}
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--cta-fill); color: var(--cta-text); padding: 8px 12px; border-radius: 10px; z-index: 20; }
.skip:focus { left: 8px; }

/* header */
.top {
  display: flex; align-items: center; gap: 12px;
  padding: 12px clamp(16px, 4vw, 40px);
  border-bottom: 1px solid var(--rule);
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
}
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 600; font-size: 17px; letter-spacing: -0.01em; }
.seal { width: 26px; height: 26px; flex: none; }
.top nav { display: flex; gap: 2px; margin-left: auto; }
.top nav a { text-decoration: none; padding: 10px 12px; border-radius: 10px; color: var(--text-2); min-height: 44px; display: inline-flex; align-items: center; font-size: 15px; }
.top nav a:hover { color: var(--text); background: var(--surface-1); }
.top nav a[aria-current="page"] { color: var(--text); }

/* content columns (spec §9.3: body 65–72 chars) */
main { padding: 0 clamp(16px, 4vw, 40px); margin: 0 auto; width: 100%; }
main.narrow { max-width: 760px; padding-top: 40px; }
main.wide { max-width: 1180px; }
/* Only the landing page opens with a hero that brings its own top space. */
main.wide > h1:first-child { margin-top: 40px; }
main.narrow > h1 { margin-top: 0; }
h1 { font-size: clamp(28px, 4.4vw, 40px); line-height: 1.16; font-weight: 600; letter-spacing: -0.025em; margin: 0 0 24px; }
h2 { font-size: clamp(22px, 2.6vw, 30px); line-height: 1.22; font-weight: 600; letter-spacing: -0.02em; margin: 0 0 12px; }
h3 { font-size: 17px; line-height: 24px; font-weight: 600; margin: 0 0 8px; }
p, ul, ol { margin: 0 0 16px; }
ul, ol { padding-left: 22px; }
li { margin-bottom: 6px; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 32px 0; }
.prose h2 { margin-top: 40px; }
.prose h3 { margin-top: 28px; }
.prose h2 + p, .prose h3 + p { margin-top: 0; }
.legal p:first-of-type { color: var(--text-2); }
/* The legal texts cite bare URLs: a 357px one panned the whole page sideways at 390 rather than breaking. */
.prose a, .legal a { overflow-wrap: anywhere; }
.lede-2 { color: var(--text-2); font-size: 17px; line-height: 27px; max-width: 62ch; }

.notice { border: 1px solid var(--border); background: var(--surface-1); border-radius: 14px; padding: 14px 16px; margin: 0 0 32px; color: var(--text-2); font-size: 14px; line-height: 20px; }
mark.ph { background: var(--mark-bg); color: var(--text); border-radius: 4px; padding: 0 4px; font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 13px; }

/* tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 14px; margin: 16px 0 16px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; line-height: 20px; min-width: 760px; }
th, td { text-align: left; vertical-align: top; padding: 11px 14px; border-bottom: 1px solid var(--border); }
/* A size or a license broken over two lines reads as two values; the table scrolls in its own box instead. */
td .mono, td.mono { white-space: nowrap; }
th { color: var(--text-3); font: 500 11px/14px "IBM Plex Mono", ui-monospace, monospace; letter-spacing: 0.08em; text-transform: uppercase; background: var(--surface-1); }
tbody tr:last-child td { border-bottom: 0; }

/* ---------- landing: hero ---------- */
.hero { position: relative; padding: clamp(48px, 9vw, 104px) 0 clamp(40px, 6vw, 72px); }
.hero-body { position: relative; z-index: 1; }
.mesh {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, var(--mesh) 0 1px, transparent 1px 36px),
    repeating-linear-gradient(0deg, var(--mesh) 0 1px, transparent 1px 36px);
  -webkit-mask-image: radial-gradient(120% 96% at 22% 8%, #000 0%, transparent 70%);
  mask-image: radial-gradient(120% 96% at 22% 8%, #000 0%, transparent 70%);
}
/* The seal is the product's mark: at desktop widths it holds the right of the hero, set in a port on the panel,
   instead of the stock illustration this page would otherwise need. */
.hero-seal { display: none; }
@media (min-width: 1140px) {
  .hero { display: grid; grid-template-columns: minmax(0, 1fr) 300px; column-gap: 48px; align-items: center; }
  .hero .mesh { grid-area: 1 / 1 / 2 / 3; }
  .hero-seal {
    display: grid; place-items: center; position: relative; z-index: 1; justify-self: center;
    width: 292px; height: 292px; border-radius: 50%; border: 1px solid var(--border);
    background: radial-gradient(circle at 50% 50%, var(--well) 0%, transparent 72%);
  }
  .hero-seal .seal { width: 188px; height: 188px; }
}
.eyebrow { font-size: 11px; line-height: 16px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-3); margin: 0 0 20px; }
.hero h1 { font-size: clamp(36px, 5.2vw, 64px); line-height: 1.04; letter-spacing: -0.035em; margin: 0 0 20px; max-width: 16ch; }
.hero .lede { font-size: clamp(17px, 1.6vw, 20px); line-height: 1.5; color: var(--text-2); max-width: 58ch; margin: 0 0 32px; }

/* The composer is the demonstration, not a decoration: the page hands the typed line straight to the app. */
.composer { display: flex; gap: 8px; max-width: 680px; background: var(--well); border: 1px solid var(--border); border-radius: 14px; padding: 8px; }
.composer input {
  flex: 1 1 auto; min-width: 0; min-height: 48px; padding: 0 14px;
  background: transparent; border: 0; color: var(--text);
  font: 400 16px/24px "IBM Plex Sans", system-ui, sans-serif;
}
.composer input::placeholder { color: var(--text-3); }
.composer input:focus { outline: none; }
.composer:focus-within { border-color: var(--accent); }
.composer button {
  flex: none; min-height: 48px; padding: 0 20px; border: 0; border-radius: 10px;
  background: var(--cta-fill); color: var(--cta-text); cursor: pointer;
  font: 500 15px/1 "IBM Plex Sans", system-ui, sans-serif;
}
.composer button:hover { filter: brightness(1.08); }
.composer-note { max-width: 62ch; margin: 12px 0 0; }
.readout {
  display: inline-flex; flex-wrap: wrap; gap: 6px 18px; margin: 28px 0 0; padding: 12px 18px;
  border: 1px solid var(--border); border-radius: 999px; background: var(--well);
  font: 400 12px/16px "IBM Plex Mono", ui-monospace, monospace; color: var(--text-2); letter-spacing: 0.04em;
}
.readout b { font-weight: 500; color: var(--accent); }
.readout .ok { color: var(--sealed); }
.readout-cap { margin: 8px 0 0; font-size: 12px; line-height: 16px; color: var(--text-3); letter-spacing: 0.02em; }

/* ---------- landing: bands ---------- */
/* A numbered rail beside each band, not a stack of centred cards: at 1024+ the page reads as an instrument panel. */
/* A grid track is min-content wide by default, so the 760px models table pushed the whole page sideways below 1024px. */
.band { border-top: 1px solid var(--rule); padding: clamp(40px, 5vw, 64px) 0; display: grid; grid-template-columns: minmax(0, 1fr); gap: 20px; }
.rail { display: flex; align-items: baseline; gap: 10px; }
.rail .num { font-size: 12px; letter-spacing: 0.1em; color: var(--accent); }
.rail-k { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-3); }
.band-body > p { max-width: 68ch; }

@media (min-width: 1024px) {
  .band { grid-template-columns: 148px minmax(0, 1fr); gap: 32px; }
  .rail { flex-direction: column; align-items: flex-start; gap: 6px; position: sticky; top: 84px; align-self: start; }
}

.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(248px, 1fr)); margin: 20px 0 0; }
/* Four cards in a three-up grid leave an orphan on the second row; these sections have four, so they go two-up. */
@media (min-width: 760px) { .grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.card { background: var(--surface-1); border: 1px solid var(--border); border-radius: 14px; padding: 20px; }
.card h3 { margin: 6px 0 8px; }
.card p { margin: 0 0 8px; color: var(--text-2); }
.card p:last-child { margin: 0; }
.card .num { font-size: 12px; line-height: 16px; color: var(--accent); letter-spacing: 0.06em; }
/* A command inside a card wraps rather than hiding its tail behind a scrollbar the reader will not find. */
.card pre { font-size: 12px; white-space: pre-wrap; overflow-wrap: anywhere; }

.steps { counter-reset: step; list-style: none; padding: 0; margin: 20px 0 0; }
.steps > li { counter-increment: step; position: relative; padding: 0 0 22px 46px; }
.steps > li:last-child { padding-bottom: 0; }
.steps > li::before {
  content: counter(step, decimal-leading-zero); position: absolute; left: 0; top: 1px;
  font: 500 12px/22px "IBM Plex Mono", ui-monospace, monospace; color: var(--accent); letter-spacing: 0.08em;
}
.steps h3 { margin: 0 0 6px; }
.steps p { color: var(--text-2); margin: 0; max-width: 66ch; }
.platform { display: inline-block; margin-left: 8px; font: 500 11px/14px "IBM Plex Mono", ui-monospace, monospace; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); border: 1px solid var(--border); border-radius: 4px; padding: 1px 6px; vertical-align: middle; }

.tiers .card { display: flex; flex-direction: column; }
.tiers .card.featured { border-color: var(--accent); }
.tiers .price { font-size: 34px; line-height: 40px; font-weight: 600; letter-spacing: -0.03em; margin: 4px 0 2px; color: var(--text); }
.tiers .price small { font-size: 14px; font-weight: 400; color: var(--text-3); letter-spacing: 0; margin-left: 6px; }
.tiers ul { padding-left: 18px; margin: 12px 0 0; color: var(--text-2); font-size: 15px; }

/* FAQ: a question is a heading with its whole answer under it, so a chunk lifted out of the page still stands alone. */
.qa-list { margin-top: 20px; border-top: 1px solid var(--rule); }
.qa { border-bottom: 1px solid var(--rule); padding: 20px 0; }
.qa h3 { margin: 0 0 8px; font-size: 18px; letter-spacing: -0.01em; }
.qa p { margin: 0; color: var(--text-2); max-width: 74ch; }

.stores { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); margin: 20px 0 16px; max-width: 720px; }
.store {
  display: flex; flex-direction: column; justify-content: center; gap: 2px;
  min-height: 76px; padding: 14px 18px; text-decoration: none;
  background: var(--surface-1); border: 1px solid var(--border); border-radius: 14px;
}
.store:hover { border-color: var(--accent); }
.store-k { font: 500 11px/14px "IBM Plex Mono", ui-monospace, monospace; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); }
.store-v { font-size: 16px; font-weight: 500; color: var(--text); }
.store-n { font-size: 13px; color: var(--text-2); }

/* ---------- blog ---------- */
.posts { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.post-link {
  display: flex; flex-direction: column; height: 100%; gap: 8px; text-decoration: none;
  background: var(--surface-1); border: 1px solid var(--border); border-radius: 14px; padding: 22px;
}
.post-link:hover { border-color: var(--accent); }
.post-link h2 { font-size: 21px; line-height: 1.24; margin: 0; }
.post-link p { color: var(--text-2); margin: 0; flex: 1 1 auto; font-size: 15px; line-height: 23px; }
.post-link .more { font: 500 13px/1 "IBM Plex Sans", system-ui, sans-serif; color: var(--accent); }
/* The first paragraph answers the title outright: it is marked so a reader and an extractor find it in the same place. */
.post .answer { font-size: 18px; line-height: 29px; color: var(--text); border-left: 2px solid var(--accent); padding-left: 18px; margin: 0 0 32px; }
.post p { max-width: 70ch; }

/* ---------- footer ---------- */
.bottom { border-top: 1px solid var(--rule); padding: 44px clamp(16px, 4vw, 40px) 56px; margin-top: 48px; color: var(--text-2); }
main.wide + .bottom { margin-top: 0; }
.footer-grid { display: grid; gap: 28px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); max-width: 1180px; margin: 0 auto 28px; }
.footer-grid > div p { margin: 12px 0 0; max-width: 34ch; }
.footer-grid nav { display: flex; flex-direction: column; align-items: flex-start; }
.footer-grid nav .label { margin-bottom: 4px; }
.footer-grid nav a { min-height: 44px; display: inline-flex; align-items: center; text-decoration: none; color: var(--text-2); font-size: 15px; }
.footer-grid nav a:hover { color: var(--text); text-decoration: underline; }
.bottom > p { max-width: 1180px; margin: 0 auto 10px; }
.readout-line { letter-spacing: 0.08em; color: var(--text-3); }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 20px; border-radius: 10px; text-decoration: none; font-weight: 500; border: 1px solid var(--border); background: var(--surface-1); color: var(--text); }
.btn.primary { background: var(--cta-fill); color: var(--cta-text); border-color: transparent; }
.btn.compact { min-height: 44px; padding: 0 14px; font-size: 14px; flex: none; }
.btn:hover { filter: brightness(1.08); }

@media (max-width: 640px) {
  /* One row cannot hold the brand, three links and the button at 44px each: the nav takes a row of its own. */
  .top { flex-wrap: wrap; gap: 8px; padding: 10px 16px; }
  .top nav { order: 3; width: 100%; margin-left: 0; border-top: 1px solid var(--rule); padding-top: 4px; }
  .top nav a { flex: 1 1 0; justify-content: center; padding: 10px 6px; font-size: 14px; }
  .btn.compact { margin-left: auto; }
  .composer { flex-wrap: wrap; }
  .composer input { flex-basis: 100%; }
  .composer button { width: 100%; }
}
@media (prefers-reduced-motion: no-preference) {
  .btn, .top nav a, .card, .store, .post-link { transition: background-color 120ms cubic-bezier(.23, 1, .32, 1), border-color 120ms cubic-bezier(.23, 1, .32, 1), color 120ms cubic-bezier(.23, 1, .32, 1); }
}